Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years
In order to investigate the effect of glacial water on the CO2 system in the fjord, we studied the variability of the total alkalinity (AT), total dissolved inorganic carbon (CT), dissolved inorganic nutrients, oxygen isotopic ratio (δ18O), and freshwater fractions from the glacier front to the oute...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | http://hdl.handle.net/2115/70590 https://doi.org/10.1002/2014JC010320 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/70590 2023-05-15T15:11:01+02:00 Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years Fransson, Agneta Chierici, Melissa Nomura, Daiki Granskog, Mats A. Kristiansen, Svein Martma, Tõnu Nehrke, Gernot http://hdl.handle.net/2115/70590 https://doi.org/10.1002/2014JC010320 eng eng Wiley http://hdl.handle.net/2115/70590 Journal of Geophysical Research : Oceans, 120(4): 2413-2429 http://dx.doi.org/10.1002/2014JC010320 © 2015 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND carbonate system fjord chemistry land-ocean interaction freshwater carbonitic bedrock primary production atmospheric CO 2 uptake West-Spitsbergen shelf Svalbard 660 article fthokunivhus https://doi.org/10.1002/2014JC010320 2022-11-18T01:04:56Z In order to investigate the effect of glacial water on the CO2 system in the fjord, we studied the variability of the total alkalinity (AT), total dissolved inorganic carbon (CT), dissolved inorganic nutrients, oxygen isotopic ratio (δ18O), and freshwater fractions from the glacier front to the outer Tempelfjorden on Spitsbergen in winter 2012 (January, March, and April) and 2013 (April) and summer/fall 2013 (September). The two contrasting years clearly showed that the influence of freshwater, mixing, and haline convection affected the chemical and physical characteristics of the fjord. The seasonal variability showed the lowest calcium carbonate saturation state (Ω) and pH values in March 2012 coinciding with the highest freshwater fractions. The highest Ω and pH were found in September 2013, mostly due to CO2 uptake during primary production. Overall, we found that increased freshwater supply decreased Ω, pH, and AT. On the other hand, we observed higher AT relative to salinity in the freshwater end‐member in the mild and rainy winter of 2012 (1142 μmol kg−1) compared to AT in 2013 (526 μmol kg−1). Observations of calcite and dolomite crystals in the glacial ice suggested supply of carbonate‐rich glacial drainage water to the fjord. This implies that winters with a large amount of glacial drainage water partly provide a lessening of further ocean acidification, which will also affect the air‐sea CO2 exchange. Article in Journal/Newspaper Arctic glacier Ocean acidification Svalbard Tempelfjord* Tempelfjorden Tidewater Spitsbergen Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Svalbard Tempelfjorden ENVELOPE(17.076,17.076,78.404,78.404) Journal of Geophysical Research: Oceans 120 4 2413 2429 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
carbonate system fjord chemistry land-ocean interaction freshwater carbonitic bedrock primary production atmospheric CO 2 uptake West-Spitsbergen shelf Svalbard 660 |
spellingShingle |
carbonate system fjord chemistry land-ocean interaction freshwater carbonitic bedrock primary production atmospheric CO 2 uptake West-Spitsbergen shelf Svalbard 660 Fransson, Agneta Chierici, Melissa Nomura, Daiki Granskog, Mats A. Kristiansen, Svein Martma, Tõnu Nehrke, Gernot Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
topic_facet |
carbonate system fjord chemistry land-ocean interaction freshwater carbonitic bedrock primary production atmospheric CO 2 uptake West-Spitsbergen shelf Svalbard 660 |
description |
In order to investigate the effect of glacial water on the CO2 system in the fjord, we studied the variability of the total alkalinity (AT), total dissolved inorganic carbon (CT), dissolved inorganic nutrients, oxygen isotopic ratio (δ18O), and freshwater fractions from the glacier front to the outer Tempelfjorden on Spitsbergen in winter 2012 (January, March, and April) and 2013 (April) and summer/fall 2013 (September). The two contrasting years clearly showed that the influence of freshwater, mixing, and haline convection affected the chemical and physical characteristics of the fjord. The seasonal variability showed the lowest calcium carbonate saturation state (Ω) and pH values in March 2012 coinciding with the highest freshwater fractions. The highest Ω and pH were found in September 2013, mostly due to CO2 uptake during primary production. Overall, we found that increased freshwater supply decreased Ω, pH, and AT. On the other hand, we observed higher AT relative to salinity in the freshwater end‐member in the mild and rainy winter of 2012 (1142 μmol kg−1) compared to AT in 2013 (526 μmol kg−1). Observations of calcite and dolomite crystals in the glacial ice suggested supply of carbonate‐rich glacial drainage water to the fjord. This implies that winters with a large amount of glacial drainage water partly provide a lessening of further ocean acidification, which will also affect the air‐sea CO2 exchange. |
format |
Article in Journal/Newspaper |
author |
Fransson, Agneta Chierici, Melissa Nomura, Daiki Granskog, Mats A. Kristiansen, Svein Martma, Tõnu Nehrke, Gernot |
author_facet |
Fransson, Agneta Chierici, Melissa Nomura, Daiki Granskog, Mats A. Kristiansen, Svein Martma, Tõnu Nehrke, Gernot |
author_sort |
Fransson, Agneta |
title |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_short |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_full |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_fullStr |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_full_unstemmed |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_sort |
effect of glacial drainage water on the co2 system and ocean acidification state in an arctic tidewater-glacier fjord during two contrasting years |
publisher |
Wiley |
url |
http://hdl.handle.net/2115/70590 https://doi.org/10.1002/2014JC010320 |
long_lat |
ENVELOPE(17.076,17.076,78.404,78.404) |
geographic |
Arctic Svalbard Tempelfjorden |
geographic_facet |
Arctic Svalbard Tempelfjorden |
genre |
Arctic glacier Ocean acidification Svalbard Tempelfjord* Tempelfjorden Tidewater Spitsbergen |
genre_facet |
Arctic glacier Ocean acidification Svalbard Tempelfjord* Tempelfjorden Tidewater Spitsbergen |
op_relation |
http://hdl.handle.net/2115/70590 Journal of Geophysical Research : Oceans, 120(4): 2413-2429 http://dx.doi.org/10.1002/2014JC010320 |
op_rights |
© 2015 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/2014JC010320 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
4 |
container_start_page |
2413 |
op_container_end_page |
2429 |
_version_ |
1766341938269650944 |